1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index c34e972f6296..5df5dd56ecc8 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -637,6 +637,13 @@ static void mt_store_field(struct hid_device *hdev,
         if (*target != DEFAULT_TRUE &&
             *target != DEFAULT_FALSE &&
             *target != DEFAULT_ZERO) {
+                if (usage->contactid == DEFAULT_ZERO ||
+                    usage->x == DEFAULT_ZERO ||
+                    usage->y == DEFAULT_ZERO) {
+                        hid_dbg(hdev,
+                                "ignoring duplicate usage on incomplete");
+                        return;
+                }
                 usage = mt_allocate_usage(hdev, application);
                 if (!usage)
                         return;